Greatest Movement

In 2025, in an ordinary high school in city S, in an ordinary class, the principal suddenly burst into the classroom and asked to summon all music students. It all started when an alien race called "The Musicians" invaded the earth. The "Musician" requires the people on Earth to write music that will make the ruler of the Musicians, Emperor Kokoli Stiano, feel "no regrets in this life" within 20 years, otherwise the people on Earth will be destroyed. Although the musicians had visited four civilizations before, they were all unable to produce pleasant music without exception, so all four civilizations were destroyed. Emperor Kokoli's time is running out, so he increasingly hopes to hear music that can make him feel real happiness. Human beings find it incomprehensible. How could one destroy a civilization for the sake of music? ! The happy person replied that when civilization evolves to a certain level, survival becomes something that does not need to be considered, and then happiness becomes something that needs to be considered. The alien race of the Musician Civilization has no vision. They rely on hearing to transmit all information, and the pleasure of natural hearing has become their only motivation for survival. However, the musicians have never been satisfied with the music they wrote, so they seek happiness from other civilizations. Humanity has embarked on a 20-year arduous and difficult road to survival for its own survival. This is also the 20 years when music has been valued unprecedentedly in human history...